00001 /* @HEADER@ */ 00002 // ************************************************************************ 00003 // 00004 // Playa: Programmable Linear Algebra 00005 // Copyright 2012 Sandia Corporation 00006 // 00007 // Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation, 00008 // the U.S. Government retains certain rights in this software. 00009 // 00010 // Redistribution and use in source and binary forms, with or without 00011 // modification, are permitted provided that the following conditions are 00012 // met: 00013 // 00014 // 1. Redistributions of source code must retain the above copyright 00015 // notice, this list of conditions and the following disclaimer. 00016 // 00017 // 2. Redistributions in binary form must reproduce the above copyright 00018 // notice, this list of conditions and the following disclaimer in the 00019 // documentation and/or other materials provided with the distribution. 00020 // 00021 // 3. Neither the name of the Corporation nor the names of the 00022 // contributors may be used to endorse or promote products derived from 00023 // this software without specific prior written permission. 00024 // 00025 // THIS SOFTWARE IS PROVIDED BY SANDIA CORPORATION "AS IS" AND ANY 00026 // EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 00027 // IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 00028 // PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL SANDIA CORPORATION OR THE 00029 // CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 00030 // EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 00031 // PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 00032 // PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 00033 // LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 00034 // NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 00035 // SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 00036 // 00037 // Questions? Contact Kevin Long (kevin.long@ttu.edu) 00038 // 00039 00040 /* @HEADER@ */ 00041 00042 #ifndef PLAYA_SIMPLE_SCALED_OP_DECL_HPP 00043 #define PLAYA_SIMPLE_SCALED_OP_DECL_HPP 00044 00045 00046 00047 #include "PlayaDefs.hpp" 00048 #include "PlayaLinearOpWithSpacesDecl.hpp" 00049 #include "PlayaLinearOperatorDecl.hpp" 00050 00051 00052 namespace Playa 00053 { 00054 using namespace Teuchos; 00055 00056 00057 00058 00059 /** 00060 * Represent a scaled operator 00061 */ 00062 template <class Scalar> 00063 class SimpleScaledOp : public LinearOpWithSpaces<Scalar>, 00064 public Printable 00065 { 00066 public: 00067 /** */ 00068 SimpleScaledOp(const Scalar& alpha, const LinearOperator<Scalar>& A); 00069 00070 /** */ 00071 void apply(Teuchos::ETransp transApplyType, 00072 const Vector<Scalar>& in, 00073 Vector<Scalar> out) const; 00074 00075 00076 /** */ 00077 std::string description() const ; 00078 00079 /** */ 00080 const Scalar& alpha() const {return alpha_;} 00081 00082 /** */ 00083 LinearOperator<Scalar> op() const {return A_;} 00084 00085 /** */ 00086 void print(std::ostream& os) const ; 00087 00088 private: 00089 Scalar alpha_; 00090 LinearOperator<Scalar> A_; 00091 }; 00092 00093 00094 /** \relates SimpleScaledOp */ 00095 template <class Scalar> 00096 LinearOperator<Scalar> scaledOperator( 00097 const Scalar& scale, 00098 const LinearOperator<Scalar>& op); 00099 00100 00101 template <class Scalar> 00102 LinearOperator<Scalar> operator*(const Scalar& a, const LinearOperator<Scalar>& A); 00103 00104 } 00105 00106 #endif